The privacy of patients is jeopardised when medical records and data are spread or shared
beyond the protected cloud of institutions. This is because breaches force them to the brink
that they start abstaining from full disclosure of their condition. This type of condition has a
negative effect on scientific research, patients and all stakeholders. A blockchain-based data
sharing system is proposed to tackle this issue, which employs immutability and autonomy
properties of the blockchain to sufficiently resolve challenges associated with access control …